Single-factor Authentication (SFA) vs. Multi-factor Authentication (MFA)

What is Single-factor Authentication (SFA)?
Single-factor authentication is the simplest form of authentication methods. With SFA, a person matches one credential to verify himself or herself online. The most popular example of this would be a password (credential) to a username. Most verification today uses this type of authentication method.

Read more at – Single-factor Authentication (SFA) vs. Multi-factor Authentication (MFA)